First, determine a hexadecimal number; Then calculate the weights of bit 0 and bit 1; Then at the n-th position, the size of "X* 16" is used to represent the n power; Finally, the conversion result can be calculated vertically.

Hexadecimal introduction:

Hexadecimal system is a number system, which uses 16 non-repetitive symbols (0-9 and A-F) to represent numerical values. In computer science and digital systems, hexadecimal is usually used to represent the compact form of binary numbers.

Hexadecimal is a number system based on 16 symbol, which is often used to represent binary numbers. It provides a concise and clear representation method, which makes large integer and binary data easier to read and process. It is widely used in computer science and digital systems, such as programming, data storage and communication protocols. Hexadecimal and binary can be easily converted, making it easier for people to understand and manipulate numbers.

The application is as follows:

1, low-level programming: In computer science, hexadecimal is widely used in low-level programming and machine language. Data and instructions in a computer are usually expressed in binary form, and programmers often use hexadecimal to represent and process these binary data when writing and debugging programs. For example, in assembly language and microcontroller programming, hexadecimal is used to represent machine instructions, memory addresses, register values, etc.

2. Memory and memory management: In the process of computer memory and memory management, hexadecimal is used to represent and operate memory addresses and data. Memory addresses are usually expressed in hexadecimal, for example, 0x0000 means address 0, and 0xFFFF means maximum address. Similarly, the data in the memory can also be expressed in hexadecimal, which is convenient for viewing and modifying the contents of the memory.

3. Network protocol and communication: In the field of network protocol and communication, hexadecimal is often used to represent and parse network data. For example, in the transport layer protocol TCP/IP, IP address, port number, packet header and so on are expressed in hexadecimal. Representing data in hexadecimal can simplify the readability and transmission efficiency of data.

4. Color representation: In graphics and image processing, colors are usually expressed in hexadecimal. Hexadecimal RGB coding can not only represent the values of red, green and blue color components, but also have intuitive visual effects. For example, #FF0000 stands for pure red and #00FF00 stands for pure green.

5. Coding and encryption: In coding and encryption algorithms, hexadecimal is widely used for data representation, processing and conversion. For example, in 16 binary coding, converting binary data into hexadecimal form can simplify data transmission and storage. In encryption algorithms, hexadecimal is also commonly used to represent keys, passwords and encryption results.

6. Debugging and error checking: In the process of software development and debugging, hexadecimal is often used to view and analyze the memory state, register value and variable content during program execution. By looking at the data expressed in hexadecimal, it is easier to find and fix the errors in the program.

7. Data storage and transmission: Hexadecimal is also widely used in the field of data storage and transmission. For example, in a storage medium such as a magnetic disk or a flash memory, data can be stored in hexadecimal code. In addition, hexadecimal is also commonly used for checksum calculation, file format recognition and data serialization.